Norwegian teenager Erling Haaland scored a first-half hat-trick on his UEFA Champions League debut as Red Bull Salzburg opened up a big first-half lead against Genk.
Haaland, 19, opened the scoring in the second minute at Red Bull Arena before adding to his tally twice in the last 15 minutes of the half.
Salzburg took a 5-1 lead into the break against their Belgian opponents as they made a near-perfect start to their Group E campaign.
Dominik Szoboszlai scored Salzburg's other goal, while Jhon Lucumí pulled one back for Genk.
For highly-rated teen forward Haaland – son of former Leeds and Manchester City player Alf-Inge Haaland – it continued an incredible start to the season which has seen him net 11 goals in just seven Austrian league games.